#galaxy surveys
8 papers · 1 filter
DB-Bench: Benchmarking Deblenders for LSST DESC Using the Blending ToolKit
Aidan Berres, Grant Merz, Xin Liu +3
The paper evaluates several image deblending algorithms for LSST galaxy surveys using the Blending ToolKit, comparing their detection, segmentation, and reconstruction performance…
J-PAS & FLAMINGO: Cosmic voids and void galaxies in the gravitational landscape of photometric surveys
J. A. Mansour, B. McCarthy, L. J. Liivamägi +34
The paper presents a method that uses a quasi‑gravitational potential field to identify dynamically dominant cosmic voids and their galaxies in photometric surveys like J‑PAS, show…
Probing Primordial Chirality in the Matter Distribution
Fang-Na Shao, Hao-Ran Yu, Ming-Jie Sheng +2
The authors develop a helicity‑based estimator to detect handedness in the large‑scale matter distribution as a signature of primordial parity violation, test it on simulations wit…
Probing the large-scale structure with 21cm-galaxy cross-bispectrum: Estimates from simulations and forecasts for upcoming cosmological surveys
Leon Noble, Suman Majumdar, Matteo Viel +7
The paper investigates the 21 cm–galaxy cross‑bispectrum using simulated galaxy evolution models and forecasts its detectability with upcoming Euclid‑like galaxy surveys and SKA‑Mi…
Star-forming clump detection in nearby galaxies using Faster R-CNN and imaging data from CLAUDS and HSC-SSP
Jürgen J. Popp, Hugh Dickinson, Stephen Serjeant +4
The paper presents a deep‑learning object detection pipeline based on Faster R‑CNN and a Zoobot backbone to locate giant star‑forming clumps in low‑redshift galaxies using six‑band…
The Dark Energy Camera All Data Everywhere cosmic shear project V: Constraints on cosmology and astrophysics from 270 million galaxies across 13,000 deg of the sky
D. Anbajagane, C. Chang, A. Drlica-Wagner +78
The paper presents cosmological and astrophysical constraints derived from cosmic shear measurements of 270 million galaxies covering 13,000 deg², combining data from the DECADE pr…